/*
 * FarmlandsGame.cpp
 *
 *  Created on: Nov 7, 2016
 *      Author: tibi
 */

#include <model/GameObject.h>
#include <controller/FarmlandsGame.h>
#include <graphics/backend/SdlRenderer.h>
#include <resources/Resources.h>

#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <SDL2/SDL_ttf.h>
#include <unistd.h>
#include <iostream>

using namespace farmlands::graphics;
using namespace farmlands::graphics::backend;
using namespace farmlands::resources;

namespace farmlands {
namespace controller {

FarmlandsGame::FarmlandsGame() :
	m_running(true),
	m_time(0)
{
}

bool FarmlandsGame::initialize()
{
	bool ok = true;

	// Initialize render system
	ok &= SdlRenderer::instance().initialize(&GameState::current().renderContext);
	if (!ok)
		return false;

	// Initialize & load resources
	ResourceManager::instance().initialize();
	ResourceManager::instance().loadGame();
	GameState::current().renderContext.viewport.pixelsPerUnitX = GameState::current().scene->cellWidth;
	GameState::current().renderContext.viewport.pixelsPerUnitY = GameState::current().scene->cellHeight;

	// Finish initialization
	GameState::current().scene->root.onInitialize();
	GameState::current().gameInitialized = true;

	return true;
}

void FarmlandsGame::onUpdateLogic()
{
	GameState::current().scene->root.onUpdateLogic();
}

void FarmlandsGame::onPreRender()
{
	GameState::current().scene->root.onPreRender();
	SdlRenderer::instance().renderBegin();
}

void FarmlandsGame::onRender()
{
	GameState::current().scene->root.onRender();
}

void FarmlandsGame::onEvent(SDL_Event& event)
{
	// Let controllers handle event
	if (GameState::current().scene->root.onEvent(event))
		return;

	// Nobody? Handle global events
	switch(event.type)
	{
	case SDL_QUIT:
		stop();
		break;

	case SDL_KEYDOWN:
		if (event.key.keysym.scancode == SDL_Scancode::SDL_SCANCODE_ESCAPE)
			stop();
		break;

	case SDL_WINDOWEVENT_RESIZED:
		break;
	}
}

void FarmlandsGame::onPostRender()
{
	SdlRenderer::instance().renderEnd();
	GameState::current().scene->root.onPostRender();
}

void FarmlandsGame::onFrameEnded()
{
	GameState::current().scene->root.onFrameEnded();
}

void FarmlandsGame::stop()
{
	m_running = false;
	GameState::current().scene->root.onDestroy();
}

int FarmlandsGame::run()
{
	// Initialize game
	if (!initialize())
		return 1;

	// Main loop
	while(m_running)
	{
		// Update elapsed time
		Uint32 now = SDL_GetTicks();
		GameState::current().deltaTime = (now - m_time) * 0.001f;
		m_time = now;

		SDL_Event event;
		while (SDL_PollEvent(&event))
			onEvent(event);

		onUpdateLogic();
		onPreRender();
		onRender();
		onPostRender();
		onFrameEnded();
	}

	// Cleanup
	return 0;
}

}
}